chore(base-logging): move LogRecordPublisher from base-flow to base-logging

[deer]

LogRecordPublisher is a java.util.logging Handler that publishes LogRecords to base-flow subscribers, but it lived in base-flow, forcing that module to require java.logging for the sake of a single class that's really about logging integration, not flow itself.

This moves LogRecordPublisher into base-logging under the build.base.logging package, drops requires java.logging from base-flow/module-info.java, and adds build.base.flow as a compile-scope (previously test-scope) dependency of base-logging so it can still use Publisher, Subscriber, and SubscriberRegistry. base-logging/module-info.java now requires build.base.flow accordingly, and LoggerTests no longer needs the old build.base.flow.LogRecordPublisher import.